The Schneider Electric ENW24117 is an EasyPact NW air circuit breaker rated 800 A at 40 °C, four-pole (4P 4d), with a drawout mounting that lets you rack the breaker out for maintenance without pulling the main bus. It's built to IEC 60947-2, the standard for low-voltage switchgear, and carries a 50 kA Icu at 220...440 V AC (42 kA at 690 V AC) — so it handles hard faults on a distribution board without welding its contacts shut. The 1000 V rated insulation voltage and pollution degree 4 rating mean it's comfortable in industrial environments where dust and humidity are part of the landscape. This breaker is a Category B device, which means it's designed for selective coordination — it can hold through a downstream short-time delay so the fault clears closer to the load, keeping the rest of the plant live. Mechanical durability is 20,000 cycles with maintenance (10,000 without), and electrical durability runs 6,000 cycles at 440 V AC without maintenance. That's a solid lifespan for a main or feeder breaker in a factory distribution panel.
The ENW24117 mounts on a rail in a drawout cradle, so it's sized for a switchboard lineup — you don't bolt it direct to a panel backplate. Its footprint is 556 mm wide by 439 mm high by 395 mm deep, and connections are rear-mounted, horizontal or vertical, with a 115 mm pitch without spreader. Neutral sits on the left, and the neutral protection setting is configurable: no protection (3D), 0.5 x Ir (3D + N/2), or 1 x Ir (4D) — something to flag when you're ordering to match an existing setup.
The 25 ms maximum breaking time tells you the arc is quenched fast enough to limit thermal damage in the bus bars.